Perhaps the most atmospheric addition of Build 39 was . Over time (weeks and months in-game), the world decays:
Build 39 was a massive stepping stone, laying the groundwork for incredible features that arrived later, most notably the . The team was already hard at work on this in the background, using a new tool called AnimZed to prepare for a more fluid, stealth-based, and interactive combat system. The developers were also testing a new, more realistic weather and climate system that you can now experience in the current game builds. project zomboid build 39
